Q. In case of gases, the binary diffusivity is proportional to (where, P = pressure)

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Q. As per Gilliland's equation, the diffusivity is

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Q. Pick out the wrong statement.

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Q. A mixture of 10% C₆H₆ vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C.

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Q. Which of the following is not fixed by the process requirements, in the design of absorbers ?

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Q. If the amount of the steam used in steam distillation is increased, the temperature of distillation

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Q. The Hatta number is important in

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Q. When a multistage tray tower uses a minimum reflux ratio, it implies

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Q. CO₂ can be absorbed by

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Q. For the same process conditions, the reflux ratio of an unlagged distillation column

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Q. An ideal tower packing should not

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Q. For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same.

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Q. What is the degree of freedom of an absorption process in which only one component is transferred between phases ?

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Q. Sticky material can be dried in a __________ dryer.

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Q. Langmuir equation is associated with

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Q. During the constant rate period of drying of a solid,

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Q. With increase in the concentration of the adsorbate, the integral heat of adsorption

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Q. Small dia distillation column can be a

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Q. If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

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Q. An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is

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